Liftgate light bar



FIG. 1 is a front perspective view of a liftgate light bar showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a top view thereof.

It will be understood that the broken lines shown in the drawings illustrate portions of the liftgate light bar that form no part of the claimed design. 

CLAIM The ornamental design for a liftgate light bar, as shown and described. 